Patents by Inventor Roland Flayeux

Roland Flayeux has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for extracting bitter flavoring principles from hops
    Patent number: 4160787
    Abstract: A process is described for converting the .alpha.- and .beta.-acids of hops into the iso-.alpha. acids for use as a bitter flavoring principle ingredient for beers. The .alpha.-acids content of the hops is directly isomerized to the iso-.alpha.-acid, the bitter principle ingredient. The .beta. acids in the hops extract is transformed to the .alpha. acid either after a direct separation step before the .alpha.-acid isomerization or the residual .beta.-acids, after the isomerization, are then transformed and the resultant .alpha.-acid is isomerized. The .beta.-acid transformation results from a radiation activation followed by an oxidation step with a per - acid.The isomerization of the .alpha.-acid to the iso-.alpha.-acid is accomplished by reaction with an alkaline earth metal ethoxide preferably the magnesium ethoxide.
    Type: Grant
    Filed: March 31, 1976
    Date of Patent: July 10, 1979
    Assignee: G.I.E. Tepral
    Inventors: Manfred Moll, Roland Flayeux, Pierre Dicesare, Bernard Gross